/*
 * Copyright (C) 2008-2012, fluid Operations AG
 *
 * FedX is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.fluidops.fedx.algebra;

import com.fluidops.fedx.structures.QueryInfo;


/**
 * Interface to access the {@link QueryInfo} from all FedX Algebra nodes.
 * All FedX Algebra nodes should implement this interface.
 * 
 * @author Andreas Schwarte
 *
 */
public interface QueryRef {
	
	/**
	 * Retrieve the attached query information of the tuple expression
	 * 
	 * @return
	 */
	public QueryInfo getQueryInfo();
}
